Northern San Juan
AvalancheMark Allen · Feb 16, 2014 · Northern San Juan
Weather
West 11700ft Sky-OVR Wind-NW 10-15 (25)
Snowpack
Surface: 4 F temp affected snow @TL and @BTL, Scoured slopes to the base facet layers in near ridge crest and isolated wind deposites on the West facing aspects. Fetch is moving snow to the E-SE aspects. @<TL in the BTL 11,000ft! zone snow had the wet loose potential and was more pronounced on the solar aspects but was not limited to.
Avalanche
3X Slides observed across the valley on ESE aspects that looked to have slide during the wind event Thursday-Friday. Crown depth was Approx. 50-1M at it's deepest point. All the slides shared an aspect and were on the lee of each feature from local wind effect. The most note worthy observation was the single approx. 1000m propagation along the terrain ridge feature staring in the apline in into the TL. 1. Northern San Juan, NorthLook Out , #1, >TL, ESE, SS, N, R2.5-D2 2. Northern San Juan, NorthLook Out , #1 , >TL, ESE, SS, N, R3-D2 3. Northern San Juan, NorthLook Out , #1 , >TL, ESE, SS, N, R1-D1.5 Last, a large collaps at 11,000ft West Aspect in the trees from human weight that would have caused a slide had we been in steeper terrain.